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Finding the Fourth Proportional to 326,004.80, 489,007.20 and 219,716.60

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Solution

The fourth proportional to 326,004.80, 489,007.20 and 219,716.60 is: 329,574.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,004.80 : 489,007.20 = 219,716.60 : x
  2. Step 2: Convert to fraction form
    326,004.80/489,007.20 = 219,716.60/x
  3. Step 3: Cross multiply
    326,004.80x = 489,007.20 × 219,716.60
  4. Step 4: Simplify right side
    326,004.80x = 107,442,999,359.52
  5. Step 5: Solve for x
    x = 107,442,999,359.52/326,004.80
  6. Step 6: Final answer
    x = 329,574.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.